efi question
03-11-2007, 11:02 PM
#1
Registered
Thread Starter
Join Date: Oct 2002
Location: New Orleans,La.
Posts: 983
Likes: 0
Received 0 Likes
on
0 Posts
efi question
A buddy has a '02 502 mpi engine that just went "full rich" Runs so fat,fouls plugs instantly.Will the efi temp sensor cause this? Thanks BOB
Racer
03-12-2007, 10:43 AM
#4
Registered
The ECT sensor may be the cause, but you want to check for trouble codes before you start replacing things. You can check with just a paperclip and 12 volt LED. Also, just FYI, the last production year for the 502MPI was 2000.
Dave
Dave
03-12-2007, 11:14 PM
#6
Registered
Thread Starter
Join Date: Oct 2002
Location: New Orleans,La.
Posts: 983
Likes: 0
Received 0 Likes
on
0 Posts
Thanks guys,checked the map.I have a spare efi sensor,easy enough to change.I go from there.
Dave,don't know? It's a powerQuest('01 not a '02 like I thought)definately is a 502 mpi ??? BOB
Dave,don't know? It's a powerQuest('01 not a '02 like I thought)definately is a 502 mpi ??? BOB
03-13-2007, 06:41 AM
#7
Registered
Merc made both the 502 Mag and 496 in 2001, they rolled one out while they closed down the 502.
03-14-2007, 09:52 PM
#8
Registered
Thread Starter
Join Date: Oct 2002
Location: New Orleans,La.
Posts: 983
Likes: 0
Received 0 Likes
on
0 Posts
Well,renewing the temp sensor didn't fix it? Got no codes and the fuel is fresh.Unpluged the map and the sensor and the scan tool picked up on that so it is working.Thanks for your help.I'll fill y'all in when I figure it out. BOB
Last edited by Bob280Silencer; 03-15-2007 at 01:39 AM.
